Automatic Customized Continuous Transfer Intermittent Coater Machine For Lithium Battery Production Electrode Coating

1. Technical Parameters and Main Configuration of Machine

1.1 Main Configuration

NO.	Name	Place of Origin
1	Air switch	Chint / Delixi (Domestic)
2	PLC	OMRON
3	Touch screen	Weinview
4	Modular	OMRON
5	Intermediate relay	Schneider
6	Servo motor	Mitsubishi
7	Planetary reducer	Feng Hua (Taiwan)
8	Circuit breaker	Delixi (Domestic)
9	AC contactor	Delixi (domestic)
10	Solid state relay	FOTEK (Taiwan)
11	Thermostat	Yatai (Domestic)
12	Automatic deviation correction	Ultrasonic
13	Full automatic tension	Variable frequency tension
14	Optical fiber electric eye	KEYENCE (Japan)
15	Push cylinder	Yadeke / Qilico
16	Deep groove ball bearing (Machine head)	NSK/NTN
17	Coating roller	Hard chromium plating
18	Back roller	Imported EPDM
19	Scraper	Hard chromium plating
20	Guide roller	Anodizing of aluminum alloy surface
21	Frequency converter	Yingweiteng
22	Fan	Xin fan

 

1.2 Technical Parameters

NO.	Project	Technical Parameter	Remarks
1	Apply	It is applicable to the coating process of positive and negative electrode of LiFePO4、LiCoO2、LiMn2O4and other type batteries
2	Operating substrate thickness	Aluminum foil(Al):10-30um; Copper foil(Cu):7-30um
3	Design width of roll surface	380 mm
4	Guaranteed coating width	100-300mm
5	Mechanical running speed	7m/min
6	Coating speed	≤2m/min	It depends on the drying condition
7	Suitable slurry viscosity	2000-16000 cps
8	Single side coating dry thickness range	50-200μm
9	Minimum intermittent length	≥5mm	Related to slurry characteristics
10	Minimum coating length of multiple sections	≥20mm	Related to slurry characteristics
11	Solvent properties	Oily solvent NMP(s.g=1.033,b.p=204℃)
		Aqueous solvent H2O/NMP(s.g=1.000,b.p=100℃)
12	Suitable solid content	Positive S.C. 60%±20%
		Negative S.C. 50%±10% (PVDF system) S.C. 50%±5%（SBR system）
13	Single side coating dry thickness error	Within ± 3um
14	Coating method	Double layer front and back 3-stage unequal distance intermittent transfer coating / second side automatic tracking / continuous transfer coating
15	Substrate running direction	Forward coating, substrate forward and reverse empty foil operation
16	Overall dimensions	L8.5*W1.5*H2.3m

2. Structure Introduction of Each Part

2.1 Integral Unwinding, Head Mechanism

NO.	Project	Technical Parameter	Remarks
1	Roller mounting structure	Rack installation mode
2	Roller surface treatment	Surface oxidation of metal aluminum roller
3	Tension control system	Closed loop automatic control, constant tension, tension range 0-50N
4	Deviation correction method	Automatic EPC control, stroke 80mm
5	Coiling mode	The material roll is fixed by 3-inch air expansion shaft
		Unwinding single shaft support
6	Substrate running direction	Forward and reverse
7	Substrate running speed	5m/min
8	Maximum unwinding diameter	Ф 300mm
9	Maximum bearing capacity of inflatable shaft	100Kg
10	Number of unwinding inflatable shafts	Article 1
11	Main drive motor	Servo motor
12	Intermittent push	Servo drive
13	Roller surface treatment	Surface oxidation of metal aluminum roller, circular runout ≤ 30um
14	Scraper structure	Double sided comma scraper, diameter Ø 80mm
15	Scraper angle rotation control	Handle rotation
16	Coating roller (Steel roller)	The surface is plated with hard chromium, with a diameter of Φ 120mm
17	Back roller (Rubber roller)	Φ 120mm in diameter, imported EPDM for surface bread
18	Trough mixing	The rodless cylinder moves in a straight line and the speed is adjustable
19	Intermittent height adjustment of scraper	Manual adjustment
20	Stand alone head position	Installation and operation before drying channel

2.2 Drying Channel

NO.	Project	Technical Parameter	Remarks
1	Oven structure	Double layer heating, arranged up and down
2	Oven length	6m (3m/section*2)
3	Material	SUS304 stainless steel, inner liner 1.0mm, outer liner 1.2mm
4	Driving mode of oven guide roller	Passive idler drive
5	Temperature control	It is divided into protection control of normal working temperature control and overtemperature monitoring alarm. In case of overtemperature, audible and visual alarm will appear and the main heating power supply will be cut off; Each section is completely controlled independently.
6	Heating way	Electric heating, hot air circulation structure
7	Heating power of single section oven	13.5KW/3m
8	Temperature in drying channel	Design Max 150 ℃, temperature difference in single section oven ≤ 5 ℃
9	Box surface temperature during operation	≤45℃
10	Blowing mode	Upper and lower air blowing, and the upper and lower air volume are controlled respectively through valves; The upper and lower air chambers share the heating body
11	Exhaust volume control of each section	Air volume of circulating fan 3000m³/h (single section) Exhaust air volume 4000m³/h
12	Air nozzle structure	The blowing direction is 30°from the horizontal, and the air nozzle slot is slotted with a special die
13	Heating control	Solid state relay
14	Fan material	SUS304 stainless steel
15	Solvent recovery system	No, only assist in the installation of interfaces
16	NMP solvent concentration alarm	None
17	Air chamber pressure monitoring	None

2.3 Winding Mechanism:

The function is the same as that of unwinding, with the following additions:

NO.	Project	Technical Parameter	Remarks
1	Tension	One set is installed in front of the traction roller, with closed-loop automatic control, constant tension, tension range of 0 ~ 50N, servo control.
2	Installation structure	Square frame welding
3	Number of windup inflatable shafts	Article 1	Single arm winding

2.4 Control System

NO.	Project	Technical Parameter	Remarks
1	Main control system	Touch screen, PLC, module, servo system
2	Operation mode	Manual, automatic and emergency stop; The whole machine can be operated before and after.
3	Setting range of coating and intermittent length	Coating length: 20.0-3200.0mm Intermittent length: 5.0-3200.0mm
4	Alarm condition	In case of equipment failure, the touch screen will display the corresponding correction screen
5	Counting function	Production quantity / length
6	Head and tail thickness adjustment mode	The speed ratio of steel roller and rubber roller is controlled by program

3. Machine Accuracy

3.1 Hardware Accuracy

NO.	Project	Technical Parameter	Remarks
1	Scraper	Circular jump ≤ 1.5um, Ra0 4, Straightness ≤ 1.5um
2	Coating roller (Steel roller)	Circular runout ≤ 1.5um, Ra0 4,  Straightness ≤ 1.5um
3	Rubber roller	Circular runout ≤ 10um, straightness ≤ 10um
4	Deviation correction	±0.1mm
5	Tool adjustment control repetition accuracy	±0.1um
6	Temperature control accuracy	±2℃